Theresa May has joined her fellow European leaders in condemning Donald Trump after the US president refused to back the Iran nuclear deal.

Mr Trump revealed that new sanctions could be placed on Iran, and accused it of supporting terrorism.

In a joint statement, the prime minister, German Chancellor Angela Merkel and France’s Emmanuel Macron said they are ‘concerned by the possible implications’ following Mr Trump’s announcement.

Describing the deal as ‘the culmination of 13 years of diplomacy’, the three leaders urged Congress to reconsider.

They added that Mr Trump’s plan to introduce sanctions ‘might undermine’ the agreement aimed at preventing Iran from developing a nuclear bomb.

To view this video please enable JavaScript, and consider upgrading to a web browser that
supports HTML5 video

However, they said they share the USA’s concerns about Iran’s ballistic missile program and ‘stand ready to take further appropriate measures to address these issues’.

Mr Trump had said: ‘Today I am announcing our strategy along with several major steps we’re taking to confront the Iranian regime’s hostile actions and to ensure that Iran never — and I mean never — acquires a nuclear weapon.’